Lock.



H. G. VOIGHT.

LOOK. Arrmoumn nun JULY 1, 1908.

v Patented 00 13.26, 1909,

2 SHEETS-SHEET 1.

H. G. VOIGHT.

. LOOK.

APPLIOATIPN FILED JULY 1, 1908. V I 938,444. PatentedOct. 26, 1909.

2 I Q4 a 2 1/ i fr;

| y I I H g l o UNITED STATES.

PATENT onnron.

HENRY G. VOIGH'I, OF NEW BRITAIN, CONNECTICUT, ABSIG-NOR TO RUSSELL & EBWIN MANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF LOCK.

Specification of Letters Intent.

Patented Oct. 26, 1909.

Application filed. July 1, 1908. Serial No. 441,862.

following is a full, clear, and exact description.

My invention relates to improvements in locks, and particularl I to an improved automatic dogging mec anism. In the particular form shown, the dogging mechanism is arranged to automatica ly block both the stop-work or night latch, so-called, and the latch-bolt, when the door is closed, so that said parts cannot be operated by means of an instrument'inserted between the edge of the door and the door casing.

In the accompanying drawings I have shown my invention as applied to a lock of the mortise type, and 1n said drawings Figure 1 is a si e elevation of my invention, the cap of the lock being removed. Fig. 2 is a front edge view thereof. Fig. 3 1s a view similar to Fig. 1, but showing the parts in a different position. Fig. fl illustrates a detail of construction.

- 1 represents a lock case, 2 the face plate, 3 the spring latch-bolt.

. 4 is a controller for the dogging mechanism.

5 represents a. roll-back controlled by oneof the knobs. This rollback engages a latch 3. The arm 8 1s slide 6 normally pressed forward by spring 7. The slide 6 bears against a lever 8, which in turn bears against the tail 9 of the ivoted at 10 while its free end is provide with an oiiset or arm 11.

12 is the dogging member pivoted at 13 and having a cam shoulder 14;. adjacent to the offset 11. The dog 12 is provided with the two noses 1516.

'17 is a stop slidably mounted in the case 1 and suitably connected with an operating part 18, which in this instance is a pressbutton exposed through the face plate 2 of the lock. The inner end of thestop 17 is aranged to engage with a notch in the rollback5 (as shown in Fig.3) when said button A 18 is pressed in. When, however, the button 1 8 stands in its outer osition, as indicated in Fig. 1, said stop is rec of said rollback. When the stop is free of the roll-back, the latter may be turned to retract the latch- 7 bolt 3, When it is desired to prevent the operation of the latch-bolt3 by means of the roll-back 5, the button 18 would be same, as previously described.

19 is a button connected by a walkingbeam 20 with the stop 17. By pressing 1n the button 19 the stop 17 may be retracted.

21 is a blocking-out device pivoted'at one end and connected with the controller 4:. 22 is a spring by which said blocking device 21 is actuated. The free end of this and is arranged 'to engage with a corresponding bevel 23 on the dog 12 at such time Fig. 1. At such time it will be seen that the blocking device 21 will lift the stop 12 against the action of its spring 24.

25 is a stud at the inner end of the button 19, :which, when the stop 17 is withdrawn, pro ects into the space between the noses 15 -16, as shown in Fig. 1.

Having thus described the main parts of my invention I will now explain the opera.- tion. Assuming the parts are in the position shown in. Fig. 1, the operator may turning the knob connected with roll-bac This action first moves back the slide 6, whigh in turn encounters the lever B, movlng its free and back, and thereby withdrawing the latch 3, since said lever enga es the tail 9 thereof.

n Fig. 1 the parts stand inthe osition in which they would appear when t e door is position. In Fig. 3 the parts are shown in when the stop-work is on. In this view the controller 4 is shown as pressed back, which would be its positionif the door to which the look was applied were closed. Since when the sto -work is on and. the latch dog 12 is disconnected therefrom, it follows that when the blocking-out device 21 is moved back by the controller 12, as shown in said Fig. 3, said latch dog will move to the position indicated in said fi re, in which its forward nose 16 blocks the atch 3 against being pressed back. In such looks it is customary to provide a second roll-back to be operated freely b excepting that it is not adapted to enpushed in, causing the stop to engage the" blocking device 2 1 is preferably beveledas the latch 4 is extended, as indicated. in

readily withdraw the latch 3 by simply. 5.

open and the stop-work is in the ofi the position in which they would stand one knob. This roll-back may correspon to the roll-back 5',

would retract slide 6 and arm 8', as before- The very first part of this retraction of arm 8.would cause the offset 11 to ride down the incline 14 at the tail of the latch dog 12, thus tilting the latter so as to free the latch bolt 3, whereupon a continued rotation of said roll-back would retract said latch bolt in the usual way.

If the parts stood in the position shown in Fig. 3, in which the stop 17 is shown as pressed in to engage the roll-back 5, and in which it may be assumed the door is closed so that the strike-plate is holding back the bolt 4; in this position it will be seen that the dog 12 has dropped down so that the nose -16 stands to the rear of the latch bolt 1, while the nose. 15 stands to the rear of the stud 25. It follows that the latch bolt 1 cannot be forced back by any pressure applied to the outer end, nor can the button 19.

be pressed in by any like pressure, these movements being prevented by the dog noses 16--l5 respectively. If one desired to get past the lock, the only way now possible would be by operating the same properly, either through the medium of another rollback or a key.

Directly to the rear of the roll-back 5 in Fig. 3 is another similar roll-back which it may be assumed is controlled by a knob located, say, at the inner side of the door (these locks being usually applied to corridor doors or outside doors). If one were to turn this second roll-back (not held by the stop'17), this action would retract the slide 6, which in turn would press back the lever 8, which movement would instantly cause the offset 11 to ride down incline 14, tilting dog 12 from the position shown in Fig. 3 to that shown in Fig. 1, thus freeing the latchbolt which, as the knob continues to turn, would be withdrawn by the swinging back of the arm 8 as before described.- It should be stated that the parts are so fitted that the dog 12 is moved away from the latch 3,

under these conditions,'before the latch has made any substantial rearward movement, a sultable clearance being provlded, as 1nd1- 'cated in Fig. 3 to guarantee thatsaid dog 12 will be lifted out of the way of the latch before it has been retracted to any substantial extent.

In the drawings I have illustrated a perforation 26 in the lock case. This represents the space, which might be occupied by a cylinder lock, such as is commonly provided in present practice at the outer side of the lock. When such a provision is made, the le= ver 8 is provided with an extension 27, so that when the operated member of the cylinder lock is turned in the right direction and sufficiently far, it will engage said arm.

in the dual function of latch bolt and dead With such a look as described herein, if the night-latch is thrown on and the door is closed, the dog 12' moves automatically into such a position as to absolutely prevent the pushing back of the latch bolt 3 by the insertion of a thin'instrument at the edge of the door, a practice frequently resorted to by crooks. At the same time the stopwork mechanism cannot be cast off by a similar method of attack because'the do 12 blocks the same in the manner describe What I claim is: 1

1. In a look, a latch-bolt, a roll-back for actuating said latch-bolt, a stop-work for said roll-back operable from outside the lock, a dog ing device for said stop-work and latch-b0 t, and means for operating said dog including a movable arm arranged to engage and operate thefsame so long as the door stands open and being free of said dog when said door stands closed and an externally projecting device for actuating said arm.

2. In a lock and latch mechanism, a latchbolt, a slide therefor, a roll-back for operating the same, a stop work device for said roll-back including means accessible from the outer side of the lock for operating said outer side of the lock for manually operating said stop-work, a single dogging device for both the latch bolt and the stop-work,

means to allow the same to move to the dogging position while the door is closing, and

means for operating said dogging device from the roll-back through the medium of said slide, including a retractor and cooperating cam shoulders upon said retractor and do whereby, when said roll-back is turned an slide retracted, the dogging device will be retired to the inoperative position.

4. In a lock of the character described, a latch-bolt, means for operating the same, stop-work mechanism for the latter, a dogging device for both the stop-work mechanism and the latch bolt including a single pivoted plate, a swinging arm arranged to engage said dog in device and throw it out of action whi e t e door is opening, and

an operatin device connected to said swinging arm an projecting through the face of the lock adjacent to said latch-bolt.

5. In a lock of the character described, a latch-bolt, two separate means for operating said latch-bolt from one side of the lock, one of said means being knob-controlled, the other being arranged to be operated by key, a stop-work for the knob operatin means, a single dogging device arranged to lock both the stop-work and the latch-bolt when the door is closed and the stop-work is on, and means of connection between both the key- -actuated means and said dogging means whereby when the key-actuated means is 30 actuated the dog will be thrown off.

HENRY G. VOIGHT.

Witnesses:

M. S. WIARD, OHAS.'E. RUSSELL. 

